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Proceedings Paper

Two-dimensional holographic polarization grating formed on azo-dye-doped PVA films
Author(s): Andy Ying-Guey Fuh; Wei Yen Wu; Ming Shian Li; Hui Chi Lin
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Paper Abstract

This study describes an electrically tunable two-dimensional (2D) liquid crystal (LC) holographic polarization grating (HPG). It is a twisted nematic (TN) grating array, which is obtained by orthogonally overlaying two crossed 1D polarization holograms. A 1D polarization hologram has a rotating linear polarization pattern, generated by the interference of two orthogonal circularly (OC) polarized beams on a substrate that is coated with an azo-dye doped PVA layer. The images under a polarized optical microscope (POM) and the diffraction patterns from the 2D grating are simulated using the Jones matrix and a Fourier transformation. The experimental results agree with the simulated results. This work represents a substantial advance toward the realization of highly functionalized passive optical devices in which both the beam propagation direction and the polarization state can be controlled in two dimensions.

Paper Details

Date Published: 3 February 2009
PDF: 11 pages
Proc. SPIE 7232, Emerging Liquid Crystal Technologies IV, 723207 (3 February 2009); doi: 10.1117/12.807619
Show Author Affiliations
Andy Ying-Guey Fuh, National Cheng Kung Univ. (Taiwan)
Wei Yen Wu, National Cheng Kung Univ. (Taiwan)
Ming Shian Li, National Cheng Kung Univ. (Taiwan)
Hui Chi Lin, National Cheng Kung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 7232:
Emerging Liquid Crystal Technologies IV
Liang-Chy Chien; Ming Hsien Wu, Editor(s)

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